Would you like to work efficiently and safely?
Winch-in-place is a tried and tested liner insertion technique.
Inpipe’s installation equipment – which is essentially the same as for inversion – reduces the need to work down in the wastewater drain. It increases safety and the work environment for the installers compared with many other winching methods. See more about the inversion method.
With Inpipe’s equipment, it is often possible to winch the liner into your pipe directly from the vehicle, or to work from outside the vehicle.
After this you connect to the same bend as during inversion, switch on the compressed air and expand the liner.
When the expansion is finished, you run your light train in the liner direct from the vehicle, without releasing the air pressure or having personnel working in the manhole.
The advantages of the winching technique
- It can be used for all diameters and lengths of pipe.
- The technique can be effective in terrain where you cannot get sufficiently near with your installation vehicle.
The disadvantages of the winching technique
- It often requires more operations than inversion.
- You must first pull through a pull line in the pipe in order to be able to pull your wire or rope through.
- Winching often requires more resources as personnel are required at both ends of the liner.
- Doesn’t press out the water which can remain in pipe hollows.
- Because you pull your liner, often over longer distances, you must protect it against abrasion damage as holes in the foil can cause irreparable damage. You protect the liner by first pulling in a thicker protective foil at the bottom of the pipe. Alternatively the manufacturer may already have applied a protective foil to the liner during manufacture.
- Many winching methods require the personnel to release the air pressure in the liner and unscrew a hatch in a sleeve coupling after it is inflated to manually insert the light train into the liner before hardening. It can be very heavy and fiddly to do this in a narrow, deep manhole and the risk of damage on the liner increases. After hardening, the same light train must be removed in the same way.